Coupon distribution machine



FIG. 1 is a front elevation of a coupon distribution machine showing my new design;

FIG. 2 a left side elevation view thereof;

FIG. 3 a right side elevation view thereof;

FIG. 4 a rear elevation view thereof;

FIG. 5 a top plan view thereof; and

FIG. 6 a bottom plan view thereof. 

The ornamental design for a coupon distribution machine, substantially as shown and described. 